JPH0723144Y2 - Washer mounting device - Google Patents

Description

[Detailed Description of the Invention] [Outline] In order to attach the washer to the shaft, a rod-shaped member is arranged inside the adsorption head that adsorbs and holds the washer so as to be movable by a predetermined distance. The washer mounting device has a member that abuts on the tip of the shaft to stop the drive of the suction head to protect the washer and the shaft, and also has a shock absorbing action at the time of mounting.

[Industrial application field]

The present invention relates to a washer mounting device for mounting a washer on a shaft.

[Conventional technology]

To prevent the gears, etc. from falling off the shaft on which the gears, etc. are mounted,
A washer is used as a holding means attached to the tip of the shaft. Washers come in a variety of shapes and materials,
Generally, a hole for inserting the shaft is provided in the central portion, and the shaft is mounted by being fitted so as to surround the shaft in a groove provided on the outer periphery of the shaft.

Such washer mounting work is generally performed manually so as not to damage the washer and shaft.

In this work, first press the hole in the center of the washer against the tip of the shaft, and then press the washer with your finger as it is, the washer deforms and the hole in the center expands, and then press it into the groove on the outer circumference of the shaft. I was combining.

[Problems to be solved by the device]

Such manual installation work is a simple and uninteresting work although it does not require much labor. Furthermore, in order to carry out the work more quickly and accurately, a dedicated washer mounting device was absolutely necessary.

An object of the present invention is to provide a washer mounting device which enables accurate and quick mounting of the washer instead of manual work and which does not damage the washer or the shaft.

[Means for Solving the Problems]

In order to achieve the above object, a washer attaching device according to the present invention comprises a hollow outer tubular member and a rod-like member inserted in the outer tubular member so as to be movable in the longitudinal direction, and the tip of the outer tubular member is provided. The suction head that suction-holds the washer, the drive cylinder that drives the suction head toward or away from the shaft on which the washer is attached, and the suction head and the drive cylinder that are arranged between the suction head and the drive cylinder. And an elastic element for urging the and in a direction away from each other,
The rod-shaped member of the suction head is fixedly abutted on the center of the tip of the shaft, and the washer is attached to the shaft by driving the outer cylinder member along the outer circumference of the shaft in the axial direction while holding the washer by suction. The washer mounting device is provided with a stop means that adjustably regulates a moving range of the rod-shaped member with respect to the outer cylinder member of the suction head, and the stop means includes the outer cylinder member and the bar-shaped member at a position where the washer is completely attached to the shaft. The elastic element is compressed by the driving force of the drive cylinder when the relative movement between the outer cylinder member and the rod-shaped member is stopped, and the elastic element is applied to the stopping means when the washer is attached. It is characterized by absorbing.

[Action]

When the washer is sucked, the drive cylinder drives the suction head to suck the washer.At this time, the rod-shaped member slightly protrudes from the tip of the outer cylinder member of the suction head, and substantially closes the center hole of the washer to assist suction. Along with
Facilitates centering of washers.

When the washer is attached, the drive cylinder drives the suction head again to lower it onto the shaft. At this time, the rod-shaped member comes into contact with the center of the tip of the shaft. As the suction head descends, the outer cylinder member of the suction head presses the washer, and at the same time, the rod-shaped member retracts in the outer cylinder member by the shaft.

When the suction head is further lowered, the washer is deformed to widen the central hole of the washer, and the washer is fitted into the groove provided on the outer periphery of the shaft, and the mounting is completed. At this time, if the stop means is adjusted in advance so that the rod-shaped member of the suction head cannot retract further within the outer cylinder member, the drive of the suction head is stopped by the action of the rod-shaped member and the shaft, and the installation is completed. Do not over press the washer.

Further, the elastic element provided in the connecting means for connecting the drive cylinder and the suction head absorbs an impact when the washer is attached, and also absorbs an excessive amount of drive of the suction head when the shaft has a height difference.

That is, when the drive of the suction head is stopped, if the drive cylinder continues to operate up to a predetermined drive amount, the elastic element provided between the drive cylinder and the suction head is compressed, and the overdrive amount is absorbed. To be done.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

Referring to FIGS. 1 and 2, a washer mounting device 10 according to an embodiment of the present invention is supported by a frame 12. A head support plate 14 and a cylinder member 16 are installed on the frame 12 so as to be adjacent to each other and substantially parallel to each other. The head support plate 14 is slidably installed on the frame 12 via a slide guide 18 between the head support plate 14 and the frame 12. The lower end portion of the head support plate 14 in the drawing vertically extends from the head support plate 14 so as to form a bottom surface and both side surfaces.
4b and 14c are extended. And these bottom support parts 14
The suction head 20 is supported by the a and the side surface support portions 14b and 14c as described later in detail.

Further, a vacuum generator 22 such as a vacuum pump is installed above the head support plate 14 in the figure. The vacuum generator 22 is an intake pipe
By 23, it communicates with the suction head 20 and operates so that the washer is sucked onto the tip of the suction head 20.

The cylinder member 16 is fixed to the frame 12 so as to extend substantially parallel to the head support plate 14. The cylinder member 16 is a hydraulic or pneumatic cylinder. A piston rod 24 extends vertically downward from the cylinder member 16 in the drawing, and flanges 26 and 28 are provided at the tip end portion (lower end portion in the drawing) and the intermediate portion of the piston rod 24, respectively. A compression coil spring 30 and a connecting plate 32 with the head supporting plate 14 are mounted on the piston rod 24 between the flanges 26 and 28. The connecting plate 32 has, for example, a hole having a diameter slightly larger than the diameter of the piston rod 24.
Mounted movably along 24. The compression coil spring 30 mounted between the connecting plate 32 and the flange 28 at the intermediate portion of the piston rod 24 urges the connecting plate 32 toward the flange 26 at the tip of the piston rod 24. The connecting plate 32 is bent and extends upward from a portion that engages with the piston rod 24, and is further curved and extends laterally toward the head support plate 14 and is fixed to the head support plate 14. In this way, the cylinder member 16
Is a piston rod 24, a compression coil spring 30, a connecting plate 32,
The head support plate (14) is connected to the suction head (20), and the suction head (20) is driven in the axial direction of the washer. Here, in the present embodiment, the suction head 20 will be described below with the direction toward the axis as the downward direction and the opposite direction as the upward direction according to the drawings, but this device does not necessarily have to be installed in the vertical direction.
As described later in detail, the compression coil spring 30 has a function of absorbing a shock when attaching the washer to the shaft and a function of making the device correspond to the difference in height of the shaft.

According to FIG. 3, the suction head 20 comprises a cylindrical outer cylinder member 34 having a small diameter tip 33. Inside the outer cylinder member 34, holes 35 and 36 having different inner diameters are provided continuously in a two-stage manner over the entire length of the outer cylinder member 34. These holes 35 and 36
Has a hole 35 on the lower side of the outer cylinder member 34 having a smaller inner diameter than the hole 36 on the upper side. A head pin 38 as a rod-shaped member is loosely inserted in the hole 35 on the lower side of the outer cylinder member 34 with a gap between the head pin 38 and the inner wall of the hole 35. The head pin 38 has a flange 39 extending in four directions in a cross shape at one end (see FIG. 4). Flange
The length of 39 is larger than the inner diameter of the lower hole 35 of the outer tubular member 34 and smaller than the inner diameter of the upper hole 36, and when the head pin 38 is inserted into the holes 35 and 36, the flange 39 is provided between the holes. It contacts the step wall 37. Since the flange 39 is in the shape of a cross, there is a gap through which air can pass. Then, in this state, the head pin 38 slightly projects from the tip of the outer tubular member 34 (projection length is indicated by α).

A stopper block 40 is inserted into the hole 36 on the upper side of the outer cylinder member 34 as another rod-shaped member. Like the outer cylinder member 34, the stopper block 40 has a two-stage air passage inside.
41 and 42 are continuously provided over the entire length of the stopper block 40. These passages 41 and 42 have a large diameter on the upper side.
At 42, a compression coil spring 44 is embedded therein. Note that the head pin 38 and the stopper block 40 can be integrally formed.

The outer tube member 34 is held by a cap element 46 at the upper end. The cap element 46 comprises a large diameter sleeve portion 47 and a small diameter connecting portion 48. The sleeve portion 47 of the cap element 46 has a threaded hole 49 on the outer circumference, and a bolt 50 is fitted into the threaded hole 49. The upper end of the outer cylinder member 34 is the sleeve portion of the cap element 46.
When the bolt 50 is fitted into the bore portion 51 inside the 47, and the bolt 50 is tightened at this time, the tip of the bolt 50 projects into the bore portion 51, whereby the outer cylinder member 34 is held. When the rear end portion of the outer cylinder member 34 is fitted into the bore portion 51 of the cap element 46, the compression coil spring 44 embedded in the stopper block 40 abuts against the upper wall surface 52 of the bore portion 51 and is compressed, whereby the stopper block 40. And the head pin 38 is urged toward the tip of the outer cylinder member 34. Further, as shown in detail in FIG. 5, the rear end of the stopper block 40 is in contact with the upper wall surface 52, whereby the moving range 1 of the stopper block 40 is regulated. Ie stopper block 40 and cap element
The upper wall surface 52 of 46 forms a stopping means. As described above, since the connection between the outer tubular member 34 and the cap element 46 is made by the bolt 50, the upper end portion of the outer tubular member 34 is the bore portion.
The depth of fitting into 51, that is, the movable range l of the stopper block 40 and the head pin 38 inserted in the outer cylinder member 34
Can be adjusted by bolt 50.

The small diameter connection 48 of the cap element 46 has an internal air passage.
53 is provided and is connected to the intake pipe 23 of the vacuum generator 22. Further, a spherical element 54 forming a spherical plain bearing 55 is integrally provided outside the connecting portion 48. As described above, the head support plate 14
A bottom surface support portion 14a and side surface support portions 14b and 14c are provided at the lower end portion of the. A box element 56 is installed between the side surface support portions 14b and 14c so as to bridge both sides, and a spherical plain bearing 55 is formed inside the box element 56 to form a cap element.
The spherical element 54 provided on 46 is retained. The bottom surface support portion 14a of the head support plate 14 is provided with a hole 58 which is somewhat larger than the diameter of the outer cylinder member 34, and the hole 58 is formed into a spherical plain bearing.
The outer cylinder member 34 held by 55 and the cap element 46 penetrates. Further, a sleeve 60 is attached below the bottom surface support portion 14a of the head support plate 14 so as to surround the outer cylinder member 34. The sleeve 60 has a gap between it and the outer cylinder member 34, and a plurality of compression coil springs 62 are arranged at the lower end of the sleeve 60 so as to always urge the outer cylinder member 34 toward the center.
In this way, the suction head 20 can follow a slight radial deviation with respect to the shaft on which the washer is mounted, with the spherical plain bearing 55 as the center.

Next, the operation of the washer mounting device 10 according to the present invention will be described. First, the suction head 20 is driven and the vacuum generator 22
Is operated to adsorb the washer 70 placed on a table (not shown) to the tip of the adsorption head 20. This is the suction head
In the initial state of FIG. 20 (FIG. 3), at this time, the action of the compression coil spring 44 causes the stopper block 40 and the head pin 38.
Are in contact with each other, and the cross-shaped flange 39 of the head pin 38 is in contact with the step wall 37 in the outer cylindrical member 34 of the suction head 20. Therefore, as described above, the head pin 38 slightly protrudes from the tip of the outer cylindrical member 34, which causes the washer
Substantially block 70 center holes to aid adsorption and
Facilitates centering of washer 70.

When the suction head 20 sucks the washer, the cylinder member 16 drives the suction head 20 toward the shaft 72 located below the suction head tip portion 33 at a predetermined speed for a predetermined distance.

As shown in FIG. 6A, when the washer 70 comes into contact with the shaft 72, the head pin 38 of the suction head 20 comes into contact with the tip of the shaft 70 and slightly stops inside the outer cylindrical member 34 of the suction head 20. The block 40 moves backward together with the block 40, and the tip portion 33 of the outer cylinder member 34 of the suction head 20 presses the washer. When the washer 70 is further pressed as it is, the washer 70 is deformed by the flange portion 74 at the tip of the shaft 72 and the central hole of the washer 70 is widened as shown in FIG. 6B. Finally, as shown in FIG. 6 (c), the washer 70 snaps into the groove 76 on the outer periphery of the shaft 72.

In the state of FIG. 6 (c), the head pin 38 of the suction head 20 has a height h of a flange portion 74 at the tip of the shaft 72 and a length α of a portion of the suction head 20 protruding from the outer cylinder member 34 in the initial state.
(FIG. 3) is added and the inside of the outer cylinder member 34 is retracted. Of course, the stopper block 40 also moves backward at the same distance. Therefore, at this time, the bolts must be set so that the stopper block 40 and the head pin 38 cannot retract beyond this distance.
If the movable range l of the stopper block 40 and the head pin 38 is set in advance by 50 (i.e., l =
h + α), the tip portion 33 of the outer tubular member 34 does not press the washer 70 any more at the time of FIG. 6 (c), and the shaft 72 and the washer 70
(More specifically, the part of the circle p in FIG. 6 (c)) is protected.

Further, the driving distance of the suction head 20 by the cylinder member 16 is
Although it is adapted to the relative installation height of the shaft 72, when the installation height of the shaft 72 varies, the excess amount of the driving distance is the piston rod of the cylinder member 16.
It is absorbed by the compression coil spring 30 attached to 24. Of course, the compression coil spring 30 normally has a shock absorbing action at the time of mounting.

Further, the radial displacement of the suction head tip portion 33 when the washer is sucked and when the washer is attached can be followed by the compression coil spring 62 and the spherical plain bearing 55 as described above.

[Effect of device]

In the washer mounting device according to the present invention, the suction head for sucking and holding the washer has a double structure of an outer outer cylindrical member and an inner rod-shaped member, and when the washer mounting is completed, the retraction of the rod-shaped member is stopped so that the outer cylindrical member is washer. Is prevented from being excessively pressed, and an elastic element is provided between the drive cylinder and the suction head.Therefore, the extra load applied to the washer and the shaft when the washer is attached is eliminated and the impact at the time of attachment is reduced. It is absorbed, and the washer can be attached without damaging the washer and the shaft. Further, when the washer is sucked, the center of the washer can be easily centered by the action of the rod-shaped member protruding to the tip of the suction head, and moreover, the washer is sucked and held, so that the washer can be mounted quickly and accurately.

[Brief description of drawings]

FIG. 1 is a front view of a washer mounting device according to an embodiment of the present invention, FIG. 2 is a partial sectional side view of the washer mounting device of FIG. 1, and FIG. 3 is an enlarged view of the suction head in FIGS. Sectional view, FIG. 4 is a sectional view taken along line IV-IV in FIG. 3,
FIG. 5 is an enlarged view of the cap element portion of FIG. 3, and FIG. 6 is an operation explanatory view of the tip of the suction head when the washer is attached. 14 ... Head support plate, 16 ... Cylinder member, 20 ... Adsorption head, 22 ... Vacuum generator, 30 ... Compression coil spring, 34
…… Outer cylinder member, 38 …… Head pin, 40 …… Stopper block, 46 …… Cap element, 50 …… Bolt, 55 …… Spherical plain bearing, 70 …… Washer.

Claims (1)

[Scope of utility model registration request] 1. A suction head comprising a hollow outer cylinder member and a rod-shaped member inserted inside the outer cylinder member so as to be movable in the longitudinal direction, and a suction head for adsorbing and holding a washer at the tip of the outer cylinder member.
A drive cylinder that drives the suction head toward or away from the shaft on which the washer is to be attached, and the drive cylinder that is disposed between the suction head and the drive cylinder and that separates the suction head and the drive cylinder from each other. An elastic element that urges the rod-shaped member of the suction head in fixed contact with the center of the tip of the shaft, and while holding the washer at the tip of the outer cylinder member by suction. A washer mounting device for mounting a washer on the shaft by driving in the axial direction along the outer circumference of the shaft, comprising stop means for adjusting the moving range of the rod-shaped member relative to the outer cylinder member of the suction head, The stopping means is adjusted so as to stop the relative movement of the outer cylinder member and the rod-shaped member at a position where attachment of the washer to the shaft is completed, and the elastic element is When the a tubular member relative movement between the rod-shaped member is stopped, it is compressed by a driving force of the drive cylinder, to absorb the impact applied to the stop means when the washer attached, washer mounting apparatus according to claim.